Yes, it is B. The Court ruled in Brown v. Board of Education that separate white and black school systems were inherently unequal. This decision fundamentally overturned the "separate but equal" doctrine established in the Plessy v. Ferguson case. The "separate but equal" doctrine allowed for racial segregation in public facilities as long as those facilities were deemed equal in quality. However, the Court in Brown v. Board of Education held that separate educational facilities for white and black students were inherently unequal and violated the Equal Protection Clause of the Fourteenth Amendment. This landmark ruling marked a significant step towards desegregation in the United States.